Development of low static friction and high kinematic friction material

对于从静态平稳运动，动摩擦系数要大于静摩擦系数。但通常的材料表现出相反的摩擦特性。本项目的目标是开发一种从静态到动态滑动状态的平滑过渡表面。我们开发了一种纳米结构的表面密集排列和垂直排列的碳纳米管。“电刷”结构表现出从静态到动态的平滑过渡。并从实际接触面积的观察、表面形貌的测量和纳米压痕的测量结果来分析每个碳纳米管的弯曲情况。

For smooth movement from static state, it prefers that kinetic friction coefficient is higher than static one. But the usual material shows opposite frictional property. The objective of this project is to develop a surface which performs smooth transient from static state to kinetic sliding state. We developed a nano-structured surface with densely-packed and vertically-aligned carbon nanotubes. The "brush" structure shows smooth transient from static to kinetic state. And this property is explained by concerning the bending of each carbon nanotubes from the results of observation of real contact area, surface morphology measurement, and nano indentation.